Description

--- Blender version with error, and version that worked ---
Error: Blender 2.66.0 r54697
Working: Blender 2.65 r53177

--- Short description of error ---
Normals can't be set using foreach_set in Blender 2.66. For example, something like this doesn't work anymore:
verts.foreach_set("normal", normal_list)

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
1. Open Blender and make sure default "Cube" is available.
2. Copy this code into the Text Editor (or open the attached Blend file):